Bootstrap Col-XS classes are applied in the cases of devices with tiny screens - no more than 576 pixels in width. In most cases, it is a rather simple phone.
Bootstrap Col-XS: Main Tips
- Bootstrap 4 grid system offers a set of responsive classes to specify on what screens a certain layout works.
- The Bootstrap Col-XS (extra small) class applies a grid column class to an element when the screen is narrower than 576px.
- It is created by using Bootstrap
col-xs-*in your code.
The Bootstrap extra small (
col-xs) column classes apply when the screen is narrower than 576px.
Columns like the ones you see below are created by using the class prefix .col-xs-*:
Now, here we have an HTML example that creates a simple layout which applies to any screen size and looks like the one displayed above:
<div class="container"> <div class="row"> <div class="bg-info col-xs-4"> ... </div> <div class="bg-primary col-xs-8"> ... </div> </div> </div>
Theory is great, but we recommend digging deeper!
Using Bootstrap 4 grid system, you can also create auto layouts. They are made by not specifying how many columns a grid column should span (skipping the number for all column containers inside a row container).
When you do this, Bootstrap 4 automatically determines how many columns each column element should span through for all of them to be equal and span through the whole available width together:
<div class="row"> <!-- Five 20% wide columns --> <div class="bg-primary col">1</div> <div class="bg-secondary col">2</div> <div class="bg-primary col">3</div> <div class="bg-secondary col">4</div> <div class="bg-primary col">5</div> </div>
Bootstrap Col-XS: Summary
- The responsive classes are used in the grid system to specify the size of the screen that a certain layout works on.
- Bootstrap extra small, or Col-XS class applies a grid column class to an element when the user is not using a screen that is wider than 576px.